<template>
    <el-autocomplete
      v-model="state"
      :fetch-suggestions="querySearchAsync"
      placeholder="Please input"
      @select="handleSelect"
    />
  </template>
  
  <script lang="ts" setup>
  import { onMounted, ref } from 'vue'
  
  const state = ref('')
  
  interface LinkItem {
    value: string
    link: string
  }
  
  const links = ref<LinkItem[]>([])
  
  const loadAll = () => {
    return [
      { value: 'vue', link: 'https://github.com/vuejs/vue' },
      { value: 'element', link: 'https://github.com/ElemeFE/element' },
      { value: 'cooking', link: 'https://github.com/ElemeFE/cooking' },
      { value: 'mint-ui', link: 'https://github.com/ElemeFE/mint-ui' },
      { value: 'vuex', link: 'https://github.com/vuejs/vuex' },
      { value: 'vue-router', link: 'https://github.com/vuejs/vue-router' },
      { value: 'babel', link: 'https://github.com/babel/babel' },
    ]
  }
  
  let timeout: NodeJS.Timeout
  const querySearchAsync = (queryString: string, cb: (arg: any) => void) => {
    const results = queryString
      ? links.value.filter(createFilter(queryString))
      : links.value
  
    clearTimeout(timeout)
    timeout = setTimeout(() => {
      cb(results)
    }, 3000 * Math.random())
  }
  const createFilter = (queryString: string) => {
    return (restaurant: LinkItem) => {
      return (
        restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0
      )
    }
  }
  
  const handleSelect = (item: LinkItem) => {
    console.log(item)
  }
  
  onMounted(() => {
    links.value = loadAll()
  })
  </script>
  